CVE-2026-64165: linux NULL Pointer Dereference
Vulnerability summary
CVE-2026-64165 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.6% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 32 · Related 32Timeline
- 19-07-2026PublishedVulnerability first disclosed.
Description
In the Linux kernel, the following vulnerability has been resolved: ARM: integrator: Fix early initialization Starting with commit bdb249fce9ad4 ("ARM: integrator: read counter using syscon/regmap"), intcp_init_early calls syscon_regmap_lookup_by_compatible which in turn calls of_syscon_register. This function allocates memory. Since the memory management code has not been initialized at that time, the call always fails. It either returns -ENOMEM or crashes as follows. Unable to handle kernel NULL pointer dereference at virtual address 0000000c when read [0000000c] *pgd=00000000 Internal error: Oops: 5 [#1] ARM Modules linked in: CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.15.0-rc5-00026-g5fcc9bf84ee5 #1 PREEMPT Hardware name: ARM Integrator/CP (Device Tree) PC is at __kmalloc_cache_noprof+0xec/0x39c LR is at __kmalloc_cache_noprof+0x34/0x39c ... Call trace: __kmalloc_cache_noprof from of_syscon_register+0x7c/0x310 of_syscon_register from device_node_get_regmap+0xa4/0xb0 device_node_get_regmap from intcp_init_early+0xc/0x40 intcp_init_early from start_kernel+0x60/0x688 start_kernel from 0x0 The crash is seen due to a dereferenced pointer which is not supposed to be NULL but is NULL if the memory management subsystem has not been initialized. The crash is not seen with all versions of gcc. Some versions such as gcc 9.x apparently do not dereference the pointer, presumably if tracing is disabled. The problem has been reproduced with gcc 10.x, 11.x, and 13.x. Either case, if the crash is not seen, the call to syscon_regmap_lookup_by_compatible returns -ENOMEM, and sched_clock_register is never called. Fix the problem by moving the early initialization code into the standard machine initialization code.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.12%
Chance of exploitation in the next 30 days
Percentile
2%
Versus all other CVEs
30-day change
0.00 pp
From 0.12% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu166 products
- linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-139.139 | < 7.0.0-28.28
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1064.67 | < 7.0.0-1009.9
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ bdb249fce9ad44aab340be3b7a77060114f7193b, < 22c738fb51f2d8b23ddff5cc0ccb2dd685bb39d3 | ≥ bdb249fce9ad44aab340be3b7a77060114f7193b, < 812103fb6da904bd03d62cf6a9826e537318ceed | ≥ bdb249fce9ad44aab340be3b7a77060114f7193b, < 6624854554c4c2bdfed3559e5c11bb03b16e7bd1 | ≥ bdb249fce9ad44aab340be3b7a77060114f7193b, < 508b1193d63b5e073a3fe103eeb785fcba2d368c | ≥ bdb249fce9ad44aab340be3b7a77060114f7193b, < 58a112b0973f6cd6bcb8c503d1ff88be411ed0f0 | ≥ bdb249fce9ad44aab340be3b7a77060114f7193b, < e984dc22e2c24dc34d6728e338c82b1ce7862753 | ≥ bdb249fce9ad44aab340be3b7a77060114f7193b, < 33ad014abec90f37dade0e00560f28864187e21a | ≥ bdb249fce9ad44aab340be3b7a77060114f7193b, < 90d77b30a666049ad24df463f52e5d529c44e8cd | 4.9
- linux_kernel≥ 4.9, < 5.10.258 | ≥ 5.11, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.142 | ≥ 6.7, < 6.12.92 | ≥ 6.13, < 6.18.34 | ≥ 6.19, < 7.0.11 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4
Debian1 product
- linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.12-1
3 vendors · 169 products
